Man left stunned by excellent helicopter Mafia prank

This is why you never trust a guy with a briefcase!

YouTuber Josh Paler Lin has been trolling the community of Los Angeles with his pranks for a while now and his latest one cost a pretty penny.

It took 20 tries to convince someone to actually take the briefcase and little did this poor jogger know what he was getting himself in for.

After been given $100 to hold onto what he believed was a contract that needed signing, this good Samaritan got the fright of a lifetime when a chopper appears overhead.

With the ‘mystery’ man barking at him, we have never seen a guy hit the deck so fast.

Our unsuspecting victim never even finds out it was prank in the end and must have had a hell of a story when he got home.

The stunt took Josh months to plan and we can only imagine the price of renting a helicopter.

That video has racked up nearly 80,000 views since it was uploaded yesterday with Josh even appearing on Fox News to explain how he pulled it off.

Don’t feel too bad for the jogger though, he did get $200 for his trouble.

Why would you ever take the briefcase though?

You can check out some more of Paler Lin’s pranks here.